How to fix: list argument must consist only of tuples or dictionaries

Question

0.00/5 (No votes)

See more:

I have created a Tkinter desktop app with SQLalchemy as a database. When I insert a data in database the error below incurred:

What I have tried:

SQL

from sqlalchemy import text, create_engine

engine = create_engine("sqlite:///my_db.db")
my_conn = engine.connect()

def data_insert():
    # Read from the entries box
    my_name = name.get()
    my_class = class1.get()
    my_mark = mark1.get()
    my_gender = gender.get()
    my_address = address.get("1.0", "end")
    my_hostel = hostel.get()

    with engine.connect() as my_conn:
        sql = text("insert into student_address(name, class, mark, gender, hostel, address) values(?, ?, ?, ?, ?, ?)")
        val = (my_name, my_class, my_gender, my_mark, my_hostel, my_address)
        data = my_conn.execute(sql, val)
    
        my_conn.commit()
        my_conn.close()
        print("One student record was added")

The error incurred in my terminal:

Traceback (most recent call last):
  File "/nix/store/ip1pq4prmdrb0jkhv2iqv6rkrwv31gs3-python3-3.11.7/lib/python3.11/tkinter/__init__.py", line 1948, in __call__
    return self.func(*args)
           ^^^^^^^^^^^^^^^^
  File "/home/runner/CTK-CRUD1/.pythonlibs/lib/python3.11/site-packages/customtkinter/windows/widgets/ctk_button.py", line 554, in _clicked
    self._command()
  File "/home/runner/CTK-CRUD1/main.py", line 46, in data_insert
    result = my_conn.execute(sql, val)
             ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/runner/CTK-CRUD1/.pythonlibs/lib/python3.11/site-packages/sqlalchemy/engine/base.py", line 1416, in execute
    distilled_parameters = _distill_params_20(parameters)
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "lib/sqlalchemy/cyextension/util.pyx", line 32, in sqlalchemy.cyextension.util._distill_params_20
  File "lib/sqlalchemy/cyextension/util.pyx", line 23, in sqlalchemy.cyextension.util._check_item
sqlalchemy.exc.ArgumentError: List argument must consist only of tuples or dictionaries

How could I fix it?

Posted 25-Mar-24 15:47pm

Member 15783420

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Pete O'Hanlon · Accepted Answer · 2024-03-25T22:20:00

Solution 1

The problem appears to be that you are relying on positional placement of your parameters, which SQLAlchemy doesn't know how to interpret. Try creating a dictionary instead:

Python

parameters=[
  "name", my_name,
  "class", my_class,
  "gender", my_gender,
  "mark", my_mark,
  "hostel", my_hostel,
  "address", my_address]

Then, pass that into your execute instead of val.

Posted 25-Mar-24 22:20pm

Pete O'Hanlon

v2

Comments

Maciej Los 27-Mar-24 3:03am

5ed!

Pete O'Hanlon 27-Mar-24 3:06am

Thank you.

Member 15783420 · Accepted Answer · 2024-03-26T17:55:00

sql = "INSERT INTO student_address (name, class, mark, gender, address, hostel) \
               VALUES(:name, :class, :mark, :gender, :address, :hostel)"

           my_data = {
                "name": my_name,
                "class": my_class,
                "mark": my_mark,
                "gender": my_gender,
                "address": my_address,
                "hostel": my_hostel,
           }

           with engine.connect() as my_conn:
               data = my_conn.execute(text(sql), my_data)
               my_conn.commit()
           print("One student record was added")
           print(data)

This is work for me!